PROGRAM DESCRIPTION: XL tape heads have been supplied by Telex for the past 10
years and are still supplied as original equipment on our premium models.. These long
wearing heads have the unique ability to be re-manufactured to like-new condition, even
after they have been badly worn. This is accomplished by removing the four tiny screws
from the back of the head and separating the front portion of the head. A new front
section is installed using specialized alignment equipment. Often, it is not necessary to
totally replace the front of the heads. They can be restored to original specifications by
lapping and polishing to remove scratches and slight wear grooves. For either process the
worn head must be returned directly to the head manufacturer. Refinished Heads: The surface of the heads will be lapped and polished.
Upon completion, the head will meet all electrical and magnetic specifications of a new
head and will contain more than 50% of the original wear depth. A small dot will be
drilled in the front section so it can be distinguished from re-manufactured heads. See
Figure #1. Re-manufactured Heads: New front section installed., guarantying the same
wear depth and specifications as a new head..

RETURN PROCEDURE: Return the XL heads requiring service to the following
address. If possible, please list the quantity and part numbers of each head. The heads
will be refinished if the wear depth permits and re-manufactured if the wear depth is too
deep. You will be charged accordingly and heads will be returned COD unless previous
arrangements are made. Note: Exact prices are available, on request, after the heads have
been inspected. Note : If you want all heads to be re-manufactured (not refinished),
please request this service.

Note: Electro Magnetic Components (EMC) is the
manufacturer of XL heads. Tellus is their representative. Each is an independent company.
Although we recommend their work, Telex is not responsible for the action of either
company.

Table #1: XL Head Part Numbers

The following heads qualify for the head rebuilding program:

55800-000*

55801-000

55801-001

55802-000*

55802-002

55803-000*

55805-000*

55807-000

55813-000

55813-001

55814-000

55814-001

55815-000

55815-001

*These heads can be refinished but cannot be re-manufactured.

NOTE: Heads which have broken pins or open channels do not qualify for the
head rebuilding program.

New heads should be ordered directly from Telex if replacement is
necessary

NOTES:

This program supersedes Service Bulletin #114 and all other head refinishing programs
offered by Telex. This change is made to increase the speed and flexibility of the XL head
rebuilding program.

Electro Magnetic Components (EMC) and Tellus Company, Ltd. are the only authorized
refinishing or re-manufacturing agents for XL heads. New heads are not available through
either of these companies.

New heads are available only from Telex, authorized Telex dealers or authorized Telex
service stations.

Heads which have been resurfaced by companies other than EMC or Tellus may not qualify
for the rebuilding program described.